Correct Answer:- Option-D
Question47:-Which among the following devices operates only used in physical layer?
A:-Two layer switch
B:-Router
C:-Repeater
D:-Bridge
Correct Answer:- Option-C
Question48:-SEAL (Simple and Efficient Adaptation Layer) is associated with which AAL sub layer of ATM technology?
‏تاقد‎
‎B:-AAL2
‎C:-AAL3/4
‎D:-AALS
‎Correct Answer:- Option-D
Question49:-Which among the following is port number of TELNET Server?
‏1-ھ‎
‎B:-23
‎C:-25
‎D:-20
‎Correct Answer:- Option-B
Question50:-In which layer a proxy firewall filters data
A:-Network layer
B:-Transport layer
C:-Application layer
D:-Data link layer
Correct Answer:- Option-C
Question51:-Which among the following are used in digital signature?
A:-Private key of receiver and Public key of sender
B:-Private and Public key of receiver
C:-Private key of sender and Public key of receiver
D:-Private and Public key of sender
Correct Answer:- Option-D
Question52:-A5 algorithm is used in GSM for
A:-Encryption
B:-Generation of Cipher key
C:-Authenticati
D:-Integrity
Correct Answer:- Option-A
Question53:-What are the states of the Auxiliary Carry (AC) and Carry (CY) flags after executing the following 8086 program?

MOV AL, 9AH
MOV BL, 4CH
ADD AL, BL
A:-AC=0and CY =0
B:-AC =1 and CY =0
C:-AC =0 and CY =1
D-AC=1landCY=1
Correct Answer:- Option-B
Question54:-Which of the following instruction is not valid?
A:-MOV AX, 0546H
B:-PUSH BX
C:-XCHG AL, BL
D:-MOV CS, 2000H
Correct Answer:- Option-D
Question55:-For a microprocessor system of Memory mapped 10 the following statement is true
A:-Memory and [0 address spaces are distinct
B:-Memory space available is greater
C:-Same instruction can control both memory and ॥0
0:-/0 address space is greater
Correct Answer:- Option-C